Special regulations. 742-507-12. Inspection of supplies and equipment: Serviceability standard for bursters, AN-M12 and AN-M13, igniter, AN-M5, igniter, AN-M9, WP type I, igniter, AN-M9, (Na type II), igniter, Na, AN-M15, igniter, Na, AN-M16, igniter, WP, AN-M15, igniter, WP, AN-M16; Feb. 18, 1952.